The table shows results of an experiment that was
replicated
which best describes the data?
o they are neither precise nor reproducible.
they are precise but not reproducible.
o they are accurate and reproducible.
o they are accurate but not reproducible.
accepted value: 130
experiment 1
129
experiment 2
131
experiment 3
129
experiment 4
132

Crinoids, also known as sea lilies, appear to be sea plants but are not plants at all. crinoids are an echinoderm species which uses anchoring structures called holdfasts to attach themselves to the sea floor. crinoids were most abundant in pennsylvania during the mississippian period, which ranged from 375 to 320 million years ago. fossils of the crinoids shows that during most of this time pennsylvania was that provided favorable conditions for crinoid growth. a) glacial terrain b) a dry and sandy plain c) mostly mountain ranges d) covered by warm, shallow seas